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Finding the Fourth Proportional to 18,668,839.88, 28,000,897.86 and 7,317,260.12

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Solution

The fourth proportional to 18,668,839.88, 28,000,897.86 and 7,317,260.12 is: 10,974,964.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668,839.88 : 28,000,897.86 = 7,317,260.12 : x
  2. Step 2: Convert to fraction form
    18,668,839.88/28,000,897.86 = 7,317,260.12/x
  3. Step 3: Cross multiply
    18,668,839.88x = 28,000,897.86 × 7,317,260.12
  4. Step 4: Simplify right side
    18,668,839.88x = 204,889,853,235,171.34
  5. Step 5: Solve for x
    x = 204,889,853,235,171.34/18,668,839.88
  6. Step 6: Final answer
    x = 10,974,964.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.